Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Λ c + production in Pb–Pb collisions at s NN =5.02 TeV. / ALICE Collaboration.
в: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Том 793, 10.06.2019, стр. 212-223.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Λ c + production in Pb–Pb collisions at s NN =5.02 TeV
AU - ALICE Collaboration
AU - Acharya, S.
AU - Acosta, F. T.
AU - Adamová, D.
AU - Adhya, S. P.
AU - Adler, A.
AU - Adolfsson, J.
AU - Aggarwal, M. M.
AU - Aglieri Rinella, G.
AU - Agnello, M.
AU - Agrawal, N.
AU - Ahammed, Z.
AU - Ahmad, S.
AU - Ahn, S. U.
AU - Aiola, S.
AU - Akindinov, A.
AU - Al-Turany, M.
AU - Alam, S. N.
AU - Albuquerque, D. S.D.
AU - Aleksandrov, D.
AU - Alessandro, B.
AU - Alfanda, H. M.
AU - Alfaro Molina, R.
AU - Ali, Y.
AU - Alici, A.
AU - Alkin, A.
AU - Alme, J.
AU - Alt, T.
AU - Altenkamper, L.
AU - Altsybeev, I.
AU - Anaam, M. N.
AU - Andrei, C.
AU - Andreou, D.
AU - Andrews, H. A.
AU - Andronic, A.
AU - Angeletti, M.
AU - Anguelov, V.
AU - Anson, C.
AU - Antičić, T.
AU - Antinori, F.
AU - Antonioli, P.
AU - Anwar, R.
AU - Apadula, N.
AU - Aphecetche, L.
AU - Erokhin, A.
AU - Feofilov, G.
AU - Kovalenko, V.
AU - Lazareva, T.
AU - Vechernin, V.
AU - Zarochentsev, A.
AU - Zherebchevskii, V.
PY - 2019/6/10
Y1 - 2019/6/10
N2 - A measurement of the production of prompt Λ c + baryons in Pb–Pb collisions at s NN =5.02 TeV with the ALICE detector at the LHC is reported. The Λ c + and Λ‾ c − were reconstructed at midrapidity (|y|<0.5) via the hadronic decay channel Λ c + →pK S 0 (and charge conjugate) in the transverse momentum and centrality intervals 6<p T <12 GeV/c and 0–80%. The Λ c + /D 0 ratio, which is sensitive to the charm quark hadronisation mechanisms in the medium, is measured and found to be larger than the ratio measured in minimum-bias pp collisions at s=7 TeV and in p–Pb collisions at s NN =5.02 TeV. In particular, the values in p–Pb and Pb–Pb collisions differ by about two standard deviations of the combined statistical and systematic uncertainties in the common p T interval covered by the measurements in the two collision systems. The Λ c + /D 0 ratio is also compared with model calculations including different implementations of charm quark hadronisation. The measured ratio is reproduced by models implementing a pure coalescence scenario, while adding a fragmentation contribution leads to an underestimation. The Λ c + nuclear modification factor, R AA , is also presented. The measured values of the R AA of Λ c + , D s + and non-strange D mesons are compatible within the combined statistical and systematic uncertainties. They show, however, a hint of a hierarchy (R AA D 0 <R AA D s + <R AA Λ c + ), conceivable with a contribution from coalescence mechanisms to charm hadron formation in the medium.
AB - A measurement of the production of prompt Λ c + baryons in Pb–Pb collisions at s NN =5.02 TeV with the ALICE detector at the LHC is reported. The Λ c + and Λ‾ c − were reconstructed at midrapidity (|y|<0.5) via the hadronic decay channel Λ c + →pK S 0 (and charge conjugate) in the transverse momentum and centrality intervals 6<p T <12 GeV/c and 0–80%. The Λ c + /D 0 ratio, which is sensitive to the charm quark hadronisation mechanisms in the medium, is measured and found to be larger than the ratio measured in minimum-bias pp collisions at s=7 TeV and in p–Pb collisions at s NN =5.02 TeV. In particular, the values in p–Pb and Pb–Pb collisions differ by about two standard deviations of the combined statistical and systematic uncertainties in the common p T interval covered by the measurements in the two collision systems. The Λ c + /D 0 ratio is also compared with model calculations including different implementations of charm quark hadronisation. The measured ratio is reproduced by models implementing a pure coalescence scenario, while adding a fragmentation contribution leads to an underestimation. The Λ c + nuclear modification factor, R AA , is also presented. The measured values of the R AA of Λ c + , D s + and non-strange D mesons are compatible within the combined statistical and systematic uncertainties. They show, however, a hint of a hierarchy (R AA D 0 <R AA D s + <R AA Λ c + ), conceivable with a contribution from coalescence mechanisms to charm hadron formation in the medium.
UR - http://www.scopus.com/inward/record.url?scp=85064946256&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/%CE%BB-c-production-pbpb-collisions-s-nn-502-tev
U2 - 10.1016/j.physletb.2019.04.046
DO - 10.1016/j.physletb.2019.04.046
M3 - Article
AN - SCOPUS:85064946256
VL - 793
SP - 212
EP - 223
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
ER -
ID: 41565462